Gastro-intestinal magnesium silicate medicament



Patented Feb. 5, 1946 UNITED. STATE (iss'mo m'rEs'rmsL MAGNESIUM smos'm MEDICAMENT Reuben Roseman and H more, Md., assignors, by memo assignments,

to Charles H. Burton, Baltimore,

No Drawing. Original application March Serial No. 325,122. Divided and this aparry Eisenberg, Baltlplication October 28, 1942, Serial No. 463,118

3 Claims. jici. 161-55) This application is a division of our copending parent application, Serial No. 325,122, filed March 21, 1940, which has issued as Patent No. 2,384,583, which latter application discloses a method for preparing a whole group or magne- I slum silicates, by the interaction of a magnesium salt and an alkali metal silicate, and more particularly amethod for preparing a group of synthetic magnesium silicates having molecular rasilicates further make them ideal constituents of weight-reducing agents (within limits, under proper medical control), dentiirices, etc., and also suited to a variety ofother purposes which will be obvious to those skilled in the art.

We have found (among other things) that with increasing ratios of the amounts oi reacting substances, moles NazO,3.3SiOz/moles MgSOa'lHzO,

' the'products show progressively increasing silica I contents and correspondingly decreasing Imagnesia contents (water-free basis), with the attendant increasing ratios, moles SiOz/moles MgO.

'As an examplemf the antacid qualities of our- A synthetic materials, the following data (Table 1) are presented, showing the rate of reaction of the product of Experiment 1''! of our parent appli- Analyses of Experiment 17.

lor- Per- Per- Per Per- Per- Per- Percent cent cent cent cent cent cent cent slog M80 Hi Biol 080 Nflso 8: total- I Percent 810: Percent MgO 233 Bio-missus Bio-1166 basis m cation, which is hereby made a part oi this dis-- closure, with hydrochloric acid. The experiments were conducted at room temperature. wi h occasional shaking of the reaction flasks.

Table 1 on 1 HO]- .Sample, g.+Nll4 no 'rgme, fi t ti3 attuned trstioni' cc.

0.500 50.0 0.25 21.1 22.0 0.500 50.0 0.50 24.0 m0 0.500 50.0 1 21.5 2&5 0.500 50.0- a 15.2 ass 0.500 50.0 a 124 am 0.500 50.0, as 0.2 43.8

1 Indicator: Broin phenol blue.

The following is a specific example of a way of employing our invention or discovery.

Dissolve 22 lbs. 4 oz. M8S0i.71-I2O (U: S. P.) in

80 gallons tapwater contained in a glass-lined tank.

To this magnesium sulfate solution is-added, slowly, a previously prepared solution of 23,000 cc. sodium silicate solution Baum, brand E,"

- Philadelphia Quartz Co.) in 72,000 cc. tap water, with vigorous and thorough agitation of the mixture. Stirring of the precipitated magnesium silicate is continued for 15 to 30 minutes, or until a smooth, homogeneous suspension results.

The mix is now transferred-to large canvas or duck filtering bags, suspended over suitable drains and having tap water inlets at the tops; and, after adhering liquor has drained oil, the precipitate is washed, by suitable water additions with intimate mixing, draining, oi course proceeding all the while. The washing is continued until portions of the drippings show no tests (or only faint tests) for sulfate (with BaCla,HCl) and sodium (with zinc uranyl acetate). (The washing operation as outlined here is inordinately time-consuming, requiring several days, and on a large scale is most efficiently performed with the aid or a filter pres s.)

The washed material, freed as completely as possible from adhering liquid is spread in thin layers (one-eighth to one-half inch) in shallow, stainless steel or chromium-plated pans, and is allowed to dry in a warm room or oven, the drying .temperature'preierably not exceeding C. A little experience enables one to tell when the drying operation is completed, the material then being-unitormly'very white and easily cracked. Yield of silicate: at least 22 lbs.

The dried silicate is pulverized until the material ls impalpable; it is then sifted through a (or more) -mesh sieve, whereupon it is ready to be used, either alone, or in admixture with other 1 materials, for antidigestant, antacid, adsorbent, or other purposes. Thus. a powder consisting of:

; Diamrnonium hydrogen phosphate (or magv I i or, z I n P rt The synthetic silicatec' 55.6

Calcium carbonate- 40.3 Sodium bicarbo 2.3

nesium ammonium phosphate) 1 6 (Flavored-with oil of peppermint and saccharin) has found great utility in the ileld of peptic ulcer therapy. v Q I The invention or discovery as hereinabove set forth is embodied in particular form andmanner but the invention or discovery maybe variously embodied within the scope of the renewing claims.

We claim: 1. A gastm-intestinal medicament comprising a synthetic magnesium silicate having a molecular ratio, MgO:SiOa within the'ran'ge of 1:32-1:43,

and calcium carbonate.

phosphate.

3. A therapeutic product suitable for use as a gastro-intestinal medicament, comprising a synthetic magnesium silicate having a molecular ratio of Mgozsioz, within the range of 1:32 to 1:3.6, substantially free of soluble salts formed in the preparation of such silicate, and containing combined water not removed by drying at a temperature not exceeding 65 C.. and which is capable oi neutralizing hydrochloric acid over a period of at least 3 hours, together with calcium carbonate, which is readily reactive with hydrochloric acid, and diammonium hydrogen phosphate.

REUBEN ROS.

HARRY EISENBERG. 

